This is infuriating

I just bought D3 today, played for a few hours, then my account got suspended. I check my email to see that apparently, Blizzard was unable to complete my purchase. They're phones are all too busy to put me through to anybody. This is so frustrating. I've searched online but no one seems to have an answer so I'm wondering if anyone on here knows why it's happening/what can I do.

Because it's Saturday, I will be ok if the money is refunded to my card on Monday if the transaction truly didn't happen, but on my online bank, it shows that it is going through just fine.